A new result on high energy solutions for Schrödinger–Kirchhoff type equations in RNRN

In this paper, we study the following Schrödinger–Kirchhoff-type equation −(a+b∫RN|∇u|2dx)△u+V(x)u=g(x,u),x∈RN. By some special techniques, we obtain a new theorem, which improves and unites Theorems 1–4 in Wu (2011).